Yes, have her looked at just in case. You can NEVER be too careful.
By not walking her, you could turn something that she could work through and get over into a much larger deal. She needs to be able to socialize in this manner.
1. Get something to defend yourself and your dog. I carry bear spray (spray into eyes), and a baton. My female has been attacked multiple times, and I have always viewed it as MY job to protect HER. Of course, I don't care so much if I'm injured so long as she is ok.
2. I would call Animal control and see what can be done. You DO need to file a report with them immediately. And let them know what the vet says.
Mom To~ Dakoda (b/t GSD), Acheron (black GSD)